Caterpie(キャタピー) is the 10th Pokémon in the Pokédex. It is a Bug-Type, and it is known as the Worm Pokémon.

Caterpie uses the Shield Dust Ability. This Ability prevents the secondary effects of damage-dealing attacks from working. Caterpie's Hidden Ability is the Run Away Ability, which enables Caterpie to run away from battles against a Wild Pokémon unless a trapping Move or Ability is in effect.

Caterpie gain the opportunity to evolve into Metapod starting at Level 7. It can evolve a second time into Butterfree starting at Level 10.

Caterpie is in the Bug Egg group, and its Egg takes approximately 3,840 steps to hatch. It takes Caterpie One Million Experience Points to reach Level 100.

Caterpie doesn't appear in Diamond, Pearl and Platinum until after the National Pokédex has been obtained, and it appears at the South End of Route 204 with Fire Red Inserted into the Game Boy Advance Slot of a Nintendo DS. Caterpie also appears at Eterna Forest in Platinum under the aforementioned conditions. In Pokémon Heart Gold, Caterpie appears at Routes 2, 30 and 31, along with Ilex Forest, the National Park, Viridian Forest, any of the Headbutt Trees in Ilex Forest and the Bug Catching Contest.

Caterpie appears in all three versions of Pokémon Mystery Dungeon 3, appearing on the first five floors of each game's Weird-themed area and on floors 3-6 in each game's respective Final-themed area.

Caterpie has yet to appear in any of the Pokémon Ranger games as of writing.

Caterpie can be found in the Meadow Zone in PokéPark Wii: Pikachu's Adventure. Knock it out of a tree, then complete a Tag Race to obtain it. In PokéPark 2: Wonders Beyond, Caterpie appears at Windmill Way in the Arbor Area. You'll have to defeat it in battle to befriend it, after which you'll be able to call it into battle.

Ash would capture a Caterpie in the Viridian Forest in the episode "Ash Catches a Pokémon," the first Pokémon that he captured. Despite getting weakened in a battle against a Wild Pidgeotto, it was able to drive off Team Rocket's attack by using String Shot on Koffing, Ekans and Meowth. It evolved into a Metapod by the episode's end.

A Caterpie was accidentally set free from Professor Oak's Lab, only to be recaptured by Red in Chapter 2.

In Chapter 49, Yellow would save a Caterpie from getting caught in the fire and flames as a result of a battle against Super Nerd Miles in Celadon City. This Caterpie would follow Yellow and would join her team in Chapter 53. She would nickname her Caterpie Peesk, who would evolve in Chapter 89.